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United States Patent | 5,334,451 |
Barboza | August 2, 1994 |
A precoat septum in the form of a winding onto a core of textured yarn produced of continuous filaments of an organic or inorganic material. The yarn is texturized by air blowing a plurality of said filaments utilizing an air jet, and drawing off the filaments at a speed which is lower than the speed at which they enter the jet so that the resulting yarn is characterized by the filaments having a plurality of random entangled loops.
Inventors: | Barboza; Steven D. (Baltimore, MD) |
Assignee: | Memtec America Corporation (Timonium, MD) |
Appl. No.: | 051540 |
Filed: | April 26, 1993 |
Current U.S. Class: | 428/377; 210/494.1; 210/497.01; 210/497.1; 428/370; 428/372; 428/375; 428/398 |
Intern'l Class: | D02G 003/00 |
Field of Search: | 210/494.1,497.1,497.01,629,628,490,505 428/370,372,375,376,377,378,398 57/208,227,289 |
4610131 | Sep., 1986 | Eschenbach | 57/227. |
4761231 | Aug., 1988 | Tomita et al. | 210/497. |
4904380 | Feb., 1990 | Bhanot et al. | 210/497. |
5215661 | Jun., 1993 | Tanabe | 210/497. |
TABLE 1 ______________________________________ Resin Particle Analysis Particle Size (.mu.m) % by Weight ______________________________________ 5-10 0.4 10-15 1.1 15-25 5.4 25-50 24.7 50-80 22.4 >80 46.0 ______________________________________
TABLE 2 ______________________________________ Life and Efficiency Results Precoat Test Cycle 1 2 3 4 5 ______________________________________ 90% efficiency (.mu.m) 1.3 1.9 1.7 1.0 0.9 95% efficiency (.mu.m) 1.4 2.1 1.9 1.3 1.1 98% efficiency (.mu.m) 1.6 2.4 2.4 1.7 1.5 Contaminate Holding 41.5 34.3 28.4 31.3 30.1 Capacity (grams) Initial .DELTA.P (PSI) 1.6 1.8 1.9 1.7 1.8 Final .DELTA.P (PSI) 25.0 26.0 25.5 25.0 25.0 ______________________________________